The theory of functionally graded material(FGM)was applied in the fabrication process of PEN(Positive-Electrolyte-Negative),the core component of solid oxide fuel cell(SOFC).To enhance its electrochemical performance,...The theory of functionally graded material(FGM)was applied in the fabrication process of PEN(Positive-Electrolyte-Negative),the core component of solid oxide fuel cell(SOFC).To enhance its electrochemical performance,the functionally graded PEN of planar SOFC was prepared by atmospheric plasma spray(APS).The cross-sectional SEM micrograph and element energy spectrum of the resultant PEN were analyzed.Its interface resistance was also compared with that without the graded layers to investigate the electrochemical performance enhanced by the functionally graded layers.Moreover,a new process, suspension plasma spray(SPS)was applied to preparing the SOFC electrolyte.Higher densification of the coating by SPS,1.61%,is observed,which is helpful to effectively improve its electrical conductivity.The grain size of the electrolyte coating fabricated by SPS is also smaller than that by APS,which is more favourable to obtain the dense electrolyte coatings.To sum up,all mentioned above can prove that the hybrid process of APS and SPS could be a better approach to fabricate the PEN of SOFC stacks,in which APS is for porous electrodes and SPS for dense electrolyte.展开更多
利用森林火险指数仪进行森林火险实时监测,以ArcGIS Engine10作为开发平台、以SQL server 2005作为数据库设计开发了森林火险实时预警系统。系统构建包括森林火险指数仪的选址、火险指数和火险等级计算及专题图制作、信息发布。系统能...利用森林火险指数仪进行森林火险实时监测,以ArcGIS Engine10作为开发平台、以SQL server 2005作为数据库设计开发了森林火险实时预警系统。系统构建包括森林火险指数仪的选址、火险指数和火险等级计算及专题图制作、信息发布。系统能以简明的电子地图和二维表,直观显示火险指数、火险等级的监测结果及其空间分布特征。以四川仁寿为例,展示了森林火险预警功能的实现过程和效果。结果表明,预警系统能够对森林火险进行实时监测与及时预警,有利于对森林火灾进行合理预防。展开更多
基金Project(50675081)supported by the National Natural Science Foundation of ChinaProject(20080440940)supported by China Postdoctoral Science Foundation
文摘The theory of functionally graded material(FGM)was applied in the fabrication process of PEN(Positive-Electrolyte-Negative),the core component of solid oxide fuel cell(SOFC).To enhance its electrochemical performance,the functionally graded PEN of planar SOFC was prepared by atmospheric plasma spray(APS).The cross-sectional SEM micrograph and element energy spectrum of the resultant PEN were analyzed.Its interface resistance was also compared with that without the graded layers to investigate the electrochemical performance enhanced by the functionally graded layers.Moreover,a new process, suspension plasma spray(SPS)was applied to preparing the SOFC electrolyte.Higher densification of the coating by SPS,1.61%,is observed,which is helpful to effectively improve its electrical conductivity.The grain size of the electrolyte coating fabricated by SPS is also smaller than that by APS,which is more favourable to obtain the dense electrolyte coatings.To sum up,all mentioned above can prove that the hybrid process of APS and SPS could be a better approach to fabricate the PEN of SOFC stacks,in which APS is for porous electrodes and SPS for dense electrolyte.
文摘利用森林火险指数仪进行森林火险实时监测,以ArcGIS Engine10作为开发平台、以SQL server 2005作为数据库设计开发了森林火险实时预警系统。系统构建包括森林火险指数仪的选址、火险指数和火险等级计算及专题图制作、信息发布。系统能以简明的电子地图和二维表,直观显示火险指数、火险等级的监测结果及其空间分布特征。以四川仁寿为例,展示了森林火险预警功能的实现过程和效果。结果表明,预警系统能够对森林火险进行实时监测与及时预警,有利于对森林火灾进行合理预防。
